hey guys so I recently received my Little Bear Tube amp. I had been searching for awhile on a new preamp that would give me the sound I was after. I do listen to metal most of the time but on occasion I do like some of the classics such as Bob Dylan, Hendrix, the doors etc. So for these more calm releases I wanted a nice warm sound (to replace the ART djpre2). After much deliberation I ended up buying a little bear. The preamp I received had the Chinese 6N2 tubes with it (and of course the 6Z4 which I am about to get a replacement for). The new board has switches on it that allow you to swap the tubes from 12AX7 to 6N2 which I thought was quite handy. It also has a gain supplement however, it is not adjustable, the gain has high and low setting. I do like having the option to run the gain up, this can be handy with some records but I would like to see it as an adjustable gain. The sound has been great since I first hooked it up, I am very pleased with it. It has a nice warm sound, brings out the highs and bass very well. I did end up doing some reading on the tubes though. Supposedly, the Chinese tube are inferior to Russian tubes. I just so happened to be browsing ebay after researching which tubes would be the exact replacement for the 6N2 tubes I was running and came across the Russian 6H2P. these tubes are supposed to be a replacement for the Russian 6AX7. These tubes blew the Chinese 6N2 tubes right out of the water! Definitely seem to have a more defined sound to them and put out more sound at lower volume. Very pleased with this upgrade only ran the tubes for about an hour last night so we will see how they sound after awhile. I read that the Russian tubes are meant to last longer aswell. I think the only thing that bugs me a tad about the preamp is the slight hum sound it puts off but you really only hear it if the gain is on high with volume up high and you are not playing anything. also, you cannot get to the gain switch if the top of the case is on so I run it with the top open. overall, I really enjoy this preamp and it has been fairly simple to find things out about it with more research. the t10 v2.5 is definitely the way to go, the previous versions had some other minor issues. ill include a few photos just for fun.